package cn.itcast.bos.web.action.base;



import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Join;
import javax.persistence.criteria.JoinType;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;

import org.apache.commons.lang3.StringUtils;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Namespace;
import org.apache.struts2.convention.annotation.ParentPackage;
import org.apache.struts2.convention.annotation.Result;
import org.apache.struts2.convention.annotation.Results;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Scope;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.domain.Specification;
import org.springframework.stereotype.Controller;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

import cn.itcast.bos.domain.base.Courier;
import cn.itcast.bos.domain.base.Standard;
import cn.itcast.bos.service.base.CourierService;

@ParentPackage("json-default")
@Namespace("/")
@Controller
@Scope("prototype")
public class CourierAction extends ActionSupport implements ModelDriven<Courier>{
	//魔型驱动
	private Courier courier = new Courier();
	
	@Override
	public Courier getModel() {
		// TODO Auto-generated method stub
		return courier;
	}
	
	//注入service
	@Autowired
	private CourierService courierService;
	
	//添加快递员方法
	@Action(value="courier_save",
			results={@Result(name="success",
							location="./pages/base/courier.html",
							type="redirect")})
	public String save(){
		courierService.save(courier);
		return SUCCESS;
	}
	
	//属性驱动接受客户端分页参数
	private int page;
	private int rows;

	public void setPage(int page) {
		this.page = page;
	}
	public void setRows(int rows) {
		this.rows = rows;
	}
	
	//分页查询方法
	@Action(value="courier_pageQuery",
			results={@Result(name="success",type="json")})
	public String pageQuery(){
		//封装pageable对象
		Pageable pageable = new PageRequest(page-1,rows);
		//根据查询条件构造 specification条件查询对象（类似Hibernate的QBC查询）
		Specification<Courier> specification=new Specification<Courier>() {
			//自动生成条件查询方法
			//root 获取条件表达式                
			@Override
			public Predicate toPredicate(Root<Courier> root, CriteriaQuery<?> arg1, CriteriaBuilder cb) {
				List<Predicate> list = new ArrayList<Predicate>();

				// 简单单表查询
				if (StringUtils.isNotBlank(courier.getCourierNum())) {
					Predicate p1 = cb.equal(
							root.get("courierNum").as(String.class),
							courier.getCourierNum());
					list.add(p1);
				}
				if (StringUtils.isNotBlank(courier.getCompany())) {
					Predicate p2 = cb.like(
							root.get("company").as(String.class),
							"%" + courier.getCompany() + "%");
					list.add(p2);
				}
				if (StringUtils.isNotBlank(courier.getType())) {
					Predicate p3 = cb.equal(root.get("type").as(String.class),
							courier.getType());
					list.add(p3);
				}
				// 多表查询
				Join<Courier, Standard> standardJoin = root.join("standard",
						JoinType.INNER);
				if (courier.getStandard() != null
						&& StringUtils.isNotBlank(courier.getStandard()
								.getName())) {
					Predicate p4 = cb.like(
							standardJoin.get("name").as(String.class), "%"
									+ courier.getStandard().getName() + "%");
					list.add(p4);
				}
				return cb.and(list.toArray(new Predicate[0]));
			}
		};
		
		//调用业务层返回 Page
		Page<Courier> pageData = courierService.findPageData(specification,pageable);
		//将返回的page转换datagrid需要的格式
		Map<String,Object> result = new HashMap<String,Object>();
		result.put("total", pageData.getTotalElements());
		result.put("rows", pageData.getContent());
		//将结果集压入值栈顶部
		ActionContext.getContext().getValueStack().push(result);
		
		return SUCCESS;
	}
	
	//属性驱动
	private String ids;

	public void setIds(String ids) {
		this.ids = ids;
	}
	//作废快递员
	@Action(value="courier_delBatch",results={@Result(name="success",location="./pages/base/courier.html",type="redirect")})
	public String delBatch(){
		String[] idArray = ids.split(",");
		courierService.delBatch(idArray);
		return SUCCESS;
	}
	
}
